Draft and buffing rigging.



No. 692,653. Patented Feb. 4, I902. R. D. GALLAGHER, In. DRAFT ANDBUFFING RIGG-ING.

[Application flled Nov. 15, 1901. (No Model.) 2 sheets-sheet I.

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wlynefiaea ywM No. 692,653. A A Patentedfeb. 4,1902; n. u. GALLAGHER,In.

DRAFT Ann BUFFING mama.

(Applicatimi flled'Nov 15, 1901.) (No Model.) 2 sheets-sheet 2.

.Z7ae7775r I TE S ATE ATENT OFFICE.

RICHARD D. GALLAGHER, JR., OF NEW YORK, N. Y., ASSIGNOR TO STANDARDCOUPLER COMPANY, OF NEW JERSEY.

YoRK, N. Y., A CORPORATION OF NEW DRAFTHAND BUFFING mocme.

SPECIFICATION forming part of Letters Patent No. 692,653, dated February4, 1902.

Application filed November 15, 1901. Serial No. 82,460. (No model.) v

To all whom it may concern:

Be it known that I, RICHARD D. GAL A-' GHER, J r., a citizen of theUnited States, residing at New York, in the countyof New York and Stateof New York, have invented certain new and useful Improvements in Draftand Buffing Rigging; and I do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming a part of this specification, and to theletters of reference marked thereon. I Y

This invention relates to improvements in rigging designed moreespecially for use in I 5 connection with railway-oar equipment forresisting buffing and draft strains, although the invention is notlimited to such use. The type of riggingis well exemplifiedin mypriorpatents, Nos. 677,654 and 681,880, and in con- :0temporaneousapplications,Serial'Nosi66,726,

73,287, 73,288, and 73,289.

The object of the present improvements is to provide a structure whereinordinary springs, or springs having the usual orashort range ofcompression, may be employed with a corresponding range of draw-barmovement,-

if so desired, and at the same time secure the advantages due to theaugmentation ormodi-.

fication of the spring resistance by the inter- 0 position between thedraw-bar and spring of friction elements having a' differential movementwith relation to each other.

The invention consists, primarily, in pro-.

viding the yielding pressure-resisting mem- 3 5 her or spring with aretreating support controlled in its movements by thepressuretransmitting member or draw-bar and with a friction-gear forcreating a differential movement to effect the desired springcompression. The invention further consists in certain novel details ofconstruction and combinations and arrangements of parts, all as will benow described,and pointed out particularly in the appended claims.Referring to the accompanying drawings, Figure 1 is a horizontal sectionthrough a draft and buffing rigging embodying the present improvements.Fig. 2is a similar View showing friction elements at one end only of thespring. Fig. 3 is a view corresponding to Fig. 1, but with the frictionelements reversely applied. Fig. 4 is a similar view with the reversedfriction elements at one end only of the spring.

Similar letters of reference in the several figure's denote the sameparts.

The draft-timbers, car-framing, or other portion of the car structurewhich supports the draft-rigging is represented conventionally at A,while the draw-bar B and strap 0, connected therewith, are of any usualor preferred character, but of course adapted for resisting the strainsliable to be encountered in' handling heavy rolling-stock.

Inasmuch as in accordance with the presentinvention it is designed thatthe strains shall be taken up with a relatively short spring,twin'springs are preferably employed to give a greater effectiveresistance, and

while twin springs E are illustrated in the drawings it will beunderstood that one or any desired number of springs may be employedwithout departing from the spirit of the invention.

The springs E are confined between followers F F, which may or not, asdesired, be provided with projections ffor positioning the springs orfor limiting the spring com- ;pression. v,

Wedgin g frictional elementsare introduced between the followerat one orboth ends and the strap or draw-bar, as the case may be, and thearrangement is such that when under pressure one follower is advancedthe other is allowed to retreat, but at less speed, whereby adifferential movement to render the friction elements effective and tocompress the spring is secured. This result is accomplished, as shown inFig. 1, by providing a movable guiding-frame G, a central wedge H,wedge-blocks I between the two, and a follower-plate K, cooperating withthe other face of the wedge-blocks. The follower rests against thecentral wedge and guiding-frame, while the follower-plate receives thepressure of the pressure-transmitting member. Movement of theguiding-frame in one direction may be limited by shoulders L. Thus asagainst movement in one direction the frame and its inclines are fixedwhen the inclines are operative, and the arrangement may be duplicatedat each end of the springs. IVith such an arrangement pressure on one ofthe followerplates causes the wedge-blocks to advance down theguiding-inclines of the frame (which is fixed while its inclines areoperative) and the wedge to advance at a greater speed, the ratedepending upon the relative angles of the wedging-faces. The advance ofthe pressure-transmitting member in applying the pressure to onefollowerplate has also allowed the other follower-plate to retreat; butas the friction members at the rear end operate as a body they move inunison with the pressure-transmitting member, while the follower at theopposite end advances more rapidly, putting the spring undercompression.

Obviously the friction elements need not be at both ends of the springs.Thus in Fig. 2 they are shown at one end only and the guiding-frame isshown in fixed position. The rear follower (lettered M in this instance)works loosely in a guideway between stops m, and the strap (3 engagesdirectly therewith.

In operation forward pressure on the follower M compresses the springdirectly, as in the ordinary rigging; but pressure in the oppositedirection permits the rear follower to retreat and operates through thefriction elements to advance the forward follower more rapidly, therebycompressing the spring, as described in connection with Fig. 1.

In Figs. 3 and 4 the arrangement of the friction elements is reversed,and as the result of such reversal the springs are compressed by thedirect action of the pressuretransmitting member and the opposite end ofthe spring is permitted to retreat at less speed or in a less ratio.Referring particularly to Fig. 3, the springs are confined betweenfollowers N N,and cooperating with the followers are wedge-blocks O. Thewedgeblocks 0 cooperate with inclines of guidingframes P and with theinclines of wedges Q. The draw-bar and strap cooperate with the wedgesand preferably also with the frame P, for which purpose follower-platesB may be interposed at each end, as shown. Outward movement of theframes is limited by shoulders p; but they are free to move inwardlytogether with the wedge, wedgeblocks, and follower to compress the sprinWhen such action takes place, the wedge at the opposite end is allowedto retreat by reason of the movement of the strap or drawbar in the samedirection, and the follower at that end being supported by thewedgeblocks will also move outwardly, but at a less speed than thedraw-bar movement, and consequently the spring is compressed.

In Fig. etthe friction elements are at one end only of the springs, thereverse arrangement of the elements (shown in Fig. 3) being preserved;but the wedge Q, alone, and not the frame, is adapted to cooperate withthe pressure-transmitting member. At the opposite end of the springs thepressure-transmitting member cooperates directly with a follower S, freeto move inwardly, but limited in its outward movement by shoulders s.

In operation inward pressure on the follower S operates to directlycompress the spring, while the opposite end of the spring is allowed toretreat, but in less ratio, owing to the action of the frictionelements. Pressure in the opposite direction, acting on the wedge,causesthe follower at that end of the spring to advance, but at less speedthan the wedge and pressure-transmitting member, and consequently thespring compression is the same under pressure in either direction and isless in extent than the movement of the draw-bar in producing suchcompression. The ultimate resistance is effected in each instancethrough the frictional and wedging resistance of the friction elements,and such resistance is vastly increased by the compression of thespring.

With this invention short and heavy springs maybe employed, the draw-barmovement being maintained, thereby saving space or permitting theequipment to be applied in the space usually occupied by an ordinarydirectcompression equipment.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a rigging such as described, the combination of the followinginstrumentalities, to wit; a pressure-transmitting member, a spring,eonnections between both ends of the spring and pressure transmittingmember whereby the spring may move bodily with the pressure-transmittingmember and friction elements having a differential movement interposedbetween one end of said spring and pressure-transmitting member andembodying a guiding-frame held against movement when the frictionelements are operative, whereby one end of the spring is advanced morerapidly than the other to effect spring compression, as set forth.

2. In a rigging such as described, the combination of the followinginstrumentalities, to wit; a yielding pressure-resisting member,supports therefor at opposite ends thereof, movable in the samedirection during spring compression, a pressure-transmitting memher anda difierential friction mechanism interposed between one of saidsupports and the pressure-transmitting member, whereby one of saidsupports is moved at a greater speed than the other; substantially asdescribed.

3. In a rigging such as described, the combination with a yieldingpressure-resisting memberand supports for opposite ends of said member,of a pressure-transmitting member constituting a retaining means forholding said supports against relative movement away from each other anda differential gear having friction-faces interposed between one of IIOresist the movement of the pressure-trans,

said supports and the pressure-transmitting mechanism one of theelements of said gear being held in fixed position when the gear isoperative whereby when the pressure-transmitting member is moved bothsaid supports, will advance in the same direction, but one will advanceat greater speed than the other; substantially as described. 7 t l 4. Ina rigging, such as described, the combination with the bodily-movableyielding pressure-resisting member, and a pressuretransmitting membercontrolling the bodily movements of the resistance member, offriction-gear embodying inclines fixed. whenoperative, wedge,follower-plate and wedgeblocks, interposed between said members at oneend whereby during the bodily movement of the resisting member it iscompressed to mittin'g member; substantially as described.

5. In a rigging, such as described, the combination with a friction-gearembodying fixed and movable inclines with interposed wedgeblocks, of apressure-transmitting member cooperating with said friction-gear on oneside, a spring cooperating with said friction-gear on the opposite sideand a support moving in unison with the pressure-transmitting member andbetween which and the friction-gear the spring is held, whereby thespring may have a bodily movement in addition to the movement tending tocompress the same; substantially as described.

6. In a rigging such as described, the combination with the spring,followers between which it is confined, and the draw-bar and strapconstituting the support for preventing movement of the followers awayfrom each other, of a guiding-frame having inclines thereon, stopsfor-limiting the movement of the frame in one direction, a wedge,followerplate and wed ge-blocks located outside of one of the followersand cooperating therewith and with the inclineson the frame to produceadifferentialmovement between the follower and draw-bar; substantially asdescribed.

7. In a rigging such as described, the combination with the spring,followers between which it is confined, guiding-frames having inclinedfriction-faces and stops for lim1t1ng the movement of said frames, ofthe wedges,

each of said frames against movement in one direction, the wedge-blockscooperating with theinclines of the frame, the wedges cooperating withthe wedge-blocks and the spring confined between and tending to forcethe wedges apart, of the draw-bar, strap and follower-plates forming aninclosing support for holding said wedges against separation, saidframes, wedges and wedge-blocks forming a friction-gear for moving thewedges differentially to compress the spring; substantially asdescribed.

9. In a'rigging suchas described, the combination with theoppositely-located guidingframes, movable outwardly, fixed stops forlimiting the inward movement, followers be tween said frames and springsconfined between the followers, of wedges bearing on the followers,wedge-blocks interposed between the wedges and frames, follower-platescooperating with the wedge-blocks and the draw- I bar and strapsurrounding the follower-plates and constituting the support forpreventing the movement of the wedges away from each other wherebymovement in either direction will allow the spring to move bodily andwill cause the rear follower to advance more rapidly than the bodilymovement of the spring, thereby compressing the latter to resist drawbarmovements; substantially as described.

RICHARD D. GALLAGHER, JR.. Witnesses: I

A. WrTAYLOR, L. F. MOGARITY.

